Hi! For guarantors, the affordability ratio is around 4:1. I.e. if the rent is £1,200, to be paid by one tenant, who is providing one guarantor, then that guarantor would need to be earning £1,200 * 4, which is £4,800 monthly.
There are other factors which may affect this, too, and if you wish to discuss them with our referencing partners, then you can call Rentguard on 01227 467 250.
Sam